Regular ArticleOvert Verbal Responding during fMRI Scanning: Empirical Investigations of Problems and Potential Solutions
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ICA-based denoising strategies in breath-hold induced cerebrovascular reactivity mapping with multi echo BOLD fMRI
2021, NeuroImageCitation Excerpt :It is important that the signal variance associated with these confounding signals is accounted for and minimized during preprocessing or data analyses (Caballero-Gaudes and Reynolds, 2017; Liu, 2016). Head motion is a particularly problematic source of noise for task-based fMRI experiments, mainly in block designs (Johnstone et al., 2006) and in particular experimental paradigms, such as in overt speech production (Barch et al., 1999; Soltysik and Hyde, 2006; Xu et al., 2014). This concern with task-induced movement artefacts extends to respiration tasks: the experimental design is similar to that of block designs, but the amount of motion associated with paced breathing, deep breaths, or “recovery” breaths following a BH task can be very prominent and concur with the pattern of the task.